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    <title>安全验证码 | [Attendance]</title>
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        <!-- 头部 -->
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            <span style="filter: drop-shadow(0 2px 4px rgba(255, 112, 91, 0.2));font-size: 48px;">🦀</span>
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        <!-- 内容区 -->
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            <!-- 标题 -->
            <h1 style="color:#1a1a1a;font-size:20px;margin:0 0 28px 0;text-align:center;font-weight:600;">
                🔐 安全验证
            </h1>

            <!-- 验证码区块 -->
            <div style="background:rgba(255,112,91,0.08);border-radius:12px;padding:20px;margin:0 0 28px 0;text-align:center;">
                <div style="color:#666;font-size:13px;margin-bottom:8px;">您的验证码</div>
                <div style="font-size:28px;color:#ff705b;letter-spacing:3px;font-weight:700;font-family:monospace;">
                    {0}
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            <!-- 步骤引导 -->
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                <div style="display:block;margin-bottom:20px;">
                    <div style="display:inline-block;width:28px;height:28px;background:#ff705b;color:#fff;border-radius:8px;line-height:28px;text-align:center;margin-right:12px;">
                        1
                    </div>
                    <span style="color:#444;font-size:15px;">在验证页面输入上方验证码</span>
                </div>
                <div style="display:block;">
                    <div style="display:inline-block;width:28px;height:28px;background:#ff705b;color:#fff;border-radius:8px;line-height:28px;text-align:center;margin-right:12px;">
                        2
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                    <span style="color:#444;font-size:15px;">完成用户注册流程</span>
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            <!-- 安全提示 -->
            <div style="background:rgba(255,112,91,0.05);padding:16px;border-radius:8px;border:1px dashed rgba(255,112,91,0.15);">
                <div style="color:#ff705b;font-size:13px;display:flex;align-items:flex-start;">
                    <span style="display:inline-block;margin-right:8px;">⚠️</span>
                    <span>该验证码15分钟内有效，请勿向任何人泄露</span>
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        <div style="padding:20px 16px;text-align:center;color:#888;font-size:12px;border-top:1px solid rgba(0,0,0,0.05);">
            <p style="margin:8px 0;">小佘佘🦀</p>
            <p style="margin:8px 0;word-break:break-all;">客服支持：7532807878@qq.com</p>
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